CN207348114U - The stool for supporting formula counterforce device of anchor pole pullout tests - Google Patents
The stool for supporting formula counterforce device of anchor pole pullout tests Download PDFInfo
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- CN207348114U CN207348114U CN201721089928.7U CN201721089928U CN207348114U CN 207348114 U CN207348114 U CN 207348114U CN 201721089928 U CN201721089928 U CN 201721089928U CN 207348114 U CN207348114 U CN 207348114U
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- stool
- anchor pole
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- anchor
- reference stake
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Abstract
The utility model discloses the stool for supporting formula counterforce device of anchor pole pullout tests,The device includes the moveable anchor set gradually from top to bottom along anchor pole axial direction,Centre-hole jack,Backing plate,Stool for supporting,Reference stake,Datum line beam and displacement measuring instrument,Stool for supporting is made of stool surface and two stool legs vertically disposed with stool surface,Backing plate support is in stool surface,The upper end of anchor pole is from bottom to top successively at the center of the stool for supporting,Backing plate,Centre-hole jack and moveable anchor pass through,And the top of anchor pole is stretched out from moveable anchor,Moveable anchor clamps anchor pole,Reference stake squeezes into gunite concrete surface layer or rock-soil layer,Datum line beam is erected on reference stake,The gauge stand of the displacement measuring instrument is installed on datum line beam,Anchor pole is additionally provided with the body of rod between stool surface and gunite concrete surface layer or rock-soil layer and pulls out measurement piece,The upper surface for pulling out measurement piece is in contact with the indicator of displacement measuring instrument.
Description
Technical field
It the utility model is related to the stool for supporting formula of the anchor pole detection device, in particular to anchor pole pullout tests in geotechnical engineering
Counterforce device.
Background technology
Ground anchorage is the anchor pole by setting in the earth formation, and works is tightly linked together with Rock And Soil, according to
Rely the pulling force of anchor pole and the shearing strength transferring structure thing of surrounding Rock And Soil to be reinforced stratum, both fully excavate ground itself
Intensity, and mitigate dead load significantly, with holding structure thing and the engineering safety and stabilization of Rock And Soil.Mooring rod technique is due to warp
Ji, reliable and construction are fast and convenient, are widely used in China's support engineering and foundation engineering.
Current specifications GB50007-2011, GB50086-2015, GB50330-2013, JGJ120-2012, CECS22：
2005 test methods to anchor pole pullout tests, sentence steady standard etc. carried out it is more explicitly stated, but on instrument and equipment
Installation method and each specification of technical requirements substantially without reference to.
Specification DBJ15-60-2008 provides that the performance requirement of anchor pole pullout tests instrument and equipment can refer to single-pile static loading test
Instrument and equipment performance requirement, but installation method on instrument and equipment and technical requirements are not yet solved and needed there are some
The problem of further exploring, for example, the loading selection of counterforce device, datum line beam, anchor pole and stool for supporting (bearing plate), reference stake it
Between distance relation the problems such as.
Utility model content
The purpose of this utility model is to provide the stool for supporting formula counterforce device of anchor pole pullout tests, which resist anchor pole
Pull out experiment and have more operability and stronger engineering practicability, improve the accuracy of test result, reduce testing cost.
The above-mentioned purpose of the utility model is achieved through the following technical solutions：The stool for supporting formula counter-force of anchor pole pullout tests
Device, the lower end of anchor pole are stretched into rock-soil layer, it is characterised in that：Described device is included along anchor pole axial direction from top to bottom successively
Moveable anchor, centre-hole jack, backing plate and the stool for supporting of setting, described device further include reference stake, datum line beam and displacement measurement
Instrument, the stool for supporting are made of stool surface and two stool legs vertically disposed with stool surface, and stool leg is placed on gunite concrete
On surface layer or rock-soil layer, backing plate support is in stool surface, and the upper end of anchor pole is from bottom to top successively at the center of the stool for supporting, pad
Plate, centre-hole jack and moveable anchor pass through, and the top of anchor pole is stretched out from moveable anchor, and moveable anchor clamps anchor pole, described
Reference stake and datum line beam are respectively positioned on the lower section of stool surface, and reference stake squeezes into gunite concrete surface layer or rock-soil layer, and datum line beam is erected at
On reference stake, the gauge stand of the displacement measuring instrument is installed on datum line beam, and the anchor pole is positioned at stool surface and gunite concrete
The body of rod between surface layer or rock-soil layer, which is additionally provided with, pulls out measurement piece, and described pulling out measures the vertical body of rod of piece and set, and pulls out measurement
The upper surface of piece is in contact with the indicator of displacement measuring instrument, and the centre-hole jack is used for the load for loading anchor pole pullout tests
Lotus, the displacement measuring instrument be used for measure anchor pole on the amount of pulling out.
The stool for supporting formula counterforce device of the utility model uses stool for supporting, and stool for supporting is arranged on a certain distance from anchor pole
Place, then centre-hole jack is installed on stool for supporting, load counter-force is reached the one kind gone in rock-soil layer around by stool for supporting adds
Counterforce device is carried, there is higher operability and very strong engineering practicability.
In the utility model, the moveable anchor clamps anchor pole by intermediate plate.
In the utility model, it is steel disc that described pulling out, which measures piece,.
In the utility model, the distance between on the inside of two stool legs and inner side S1>=3.0d, wherein, d is anchor pole
Bore diameter.
In the utility model, the distance between center and anchor pole center of the reference stake S2>1.0m。
In the utility model, the beeline S between the center of the reference stake and stool leg3>=1B and>1.0m, wherein, B
For the width of stool leg.
Brief description of the drawings
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the overall structure diagram of the stool for supporting formula counterforce device of the utility model anchor pole pullout tests；
Fig. 2 is the front view of Fig. 1；
Fig. 3 is soil body vertical attached power calculation diagram；
Fig. 4 is the stool for supporting formula counterforce device using the utility model anchor pole pullout tests in different stool for supporting inside clearances
Soil body vertical attached power under condition lower bolt central point with change in depth distribution curve,
In figure, abscissa represents soil body vertical attached power value, and unit is kPa (kPa), and ordinate z represents depth, this
In depth refer to that vertically extending depth, unit are rice (m) downwards from the basis of the plane where anchor pole aperture；
Fig. 5 is the stool for supporting formula counterforce device using the utility model anchor pole pullout tests in different stool for supporting inside clearances
The curve map of condition lower bolt central spot surface displacement,
In figure, abscissa represents the clear distance between two stool for supporting, and unit is rice (m), and ordinate represents surface displacement, single
Position is millimeter (mm).
Description of reference numerals
1 is anchor pole, and 2 be moveable anchor, and 3 be centre-hole jack, and 4 be backing plate, and 5 be stool for supporting,
51 be stool surface, and 52 be stool leg, and 6 be gunite concrete surface layer, stake on the basis of 7,
Beam on the basis of 8,9 be displacement measuring instrument, and 10 be to pull out measurement piece.
Embodiment
The stool for supporting formula counterforce device of the utility model anchor pole pullout tests as shown in Figure 1 and Figure 2, stretch into by the lower end of anchor pole 1
In rock-soil layer, which includes the moveable anchor 2, centre-hole jack 3, pad set gradually from top to bottom along 1 axial direction of anchor pole
Plate 4 and stool for supporting 5, device further include reference stake, datum line beam 8 and displacement measuring instrument 9.
Stool for supporting 5 is formed by stool surface 51 and with 51 vertically disposed two stool legs 52 of stool surface, and stool leg 52 is placed on injection
Concrete topping 6, can be placed on rock-soil layer, 4 support of backing plate in stool surface 51, the upper end of anchor pole 1 from bottom to top successively from
At the center of stool for supporting 5, backing plate 4, centre-hole jack 3 and moveable anchor 2 pass through, and the top of anchor pole 1 is stretched from moveable anchor 2
Going out, moveable anchor 2 clamps anchor pole 1 by intermediate plate, and reference stake 7 and datum line beam 8 are respectively positioned on the lower section of stool surface 51, and reference stake 7 is one,
Datum line beam 8 is one, and reference stake 7 squeezes into gunite concrete surface layer 6, and datum line beam 8 is erected on reference stake 7.
The gauge stand of displacement measuring instrument 9 is installed on datum line beam 8, and anchor pole 1 is positioned at stool surface 51 and gunite concrete surface layer 6
Between the body of rod be additionally provided with to pull out and measure piece 10, it be steel disc to pull out and measure piece 10, pulls out and measures the setting of the piece 10 vertical body of rod, and the amount of pulling out
The upper surface for surveying piece 10 is in contact with the indicator of displacement measuring instrument 9, and centre-hole jack 3 is used to load anchor pole pullout tests
Load, displacement measuring instrument 9 be used for measure anchor pole 1 on the amount of pulling out, above the amount of pulling out shown by instrument.
In the present embodiment, the gauge stand of displacement measuring instrument 9 is magnet base, and gauge stand magnetic is on datum line beam 8, in two stool legs
The distance between side and inner side S1>=3.0d, wherein, d is the bore diameter of anchor pole.
The distance between the center and anchor pole center of reference stake 7 S2>1.0m。
Beeline S between the center of each reference stake 7 and stool leg3>=1B and>1.0m, wherein, B is the width of stool leg
Degree.
The installation method of the stool for supporting formula counterforce device of above-mentioned anchor pole pullout tests, this method comprises the following steps：
(1), reference stake 7, datum line beam 8, stool for supporting 5, backing plate 4, centre-hole jack 3, moveable anchor 2 and position are installed successively
Shift measurement instrument 9；
(2), the upper end of anchor pole 1 is from bottom to top successively at the center of stool for supporting 5, backing plate 4, centre-hole jack 3 and work
Tool anchor 2 passes through, and the compression face of the axis and moveable anchor 2, centre-hole jack 3 of anchor pole 1 is perpendicular；
(3), the moveable anchor 2 of anchor pole 1 is locked, and places displacement measuring instrument 9；
Ensure during installation：The distance between on the inside of two stool legs and inner side S1>=3.0d, in the center and anchor pole of reference stake 7
The distance between heart S2>1.0m, the beeline S between the center of each reference stake 7 and stool leg3>=1B and>1.0m
Wherein, d is the bore diameter of anchor pole, and B is the width of stool leg.
Stool for supporting foundation elasticity theoretical analysis
1885 Bu Xinneisike (J.Boussinesq) be proposed with elastic theory in semi-infinite half-space surface of elastomer
When upper effect has vertical concentrated force P, the stress analysis solution in elastomer caused by arbitrary point, the theoretical calculation of the utility model
On this basis.
Soil body vertical attached power calculates letter as shown in figure 3, ghcd is rectangular support stool load face in Fig. 3, and m is in anchor pole
Heart point.According to Bu Xinneisike Solution of Elasticity Theory, the vertical attached power below m points at any depth z is 4 rectangle bases
Bottom (mfhb, mfga, mbce, made) is to the sum of vertical attached power caused by m points, i.e.,：
σz=(Ks(mfhb)-Ks(mfga)+Ks(mbce)-Ks(made))p
In formula, p is the evenly load (kPa) on ghcd rectangular loads face；Ks be respectively rectangle mfhb, mfga, mbce,
The angle point stress coefficient of made, can be calculated by following formula：
In formula,Wherein l is the long side of rectangle, and b is the short side of rectangle.
Similarly, according to Bu Xinneisike Solution of Elasticity Theory, the surface displacement at m points is：
S=sm(mfhb)-sm(mfga)+sm(mbce)-sm(made)
In formula, SmThe surface displacement that respectively rectangle mfhb, mfga, mbce, made is produced at m points, can pass through following formula
Calculate：
In formula, μ is soil's Poisson ratio；E0For soil deformation modulus.
Consider bilateral support stool load, then soil body vertical attached power can be pressed respectively with surface displacement under anchor pole central point m
Following formula calculates：
σz=2 (Ks(mfhb)-Ks(mfga)+Ks(mbce)-Ks(made))p
S=2 (sm(mfhb)-sm(mfga)+sm(mbce)-sm(made))
It is now assumed that static test load is 50kN, soil deformation modulus is 30MPa, and Poisson's ratio 0.25 is normal for scene
Soil nailing type steel floral tube (diameter about d=15cm), calculates under the anchor pole central point under the conditions of different stool for supporting inside clearances
Soil body vertical attached power and surface displacement.
Soil body vertical attached power result of calculation is as shown in table 1, is vertically added according to the soil body that the result of calculation of table 1 is drawn
Stress is as shown in Figure 4 with the scatter chart of change in depth.
Table 1：Soil body vertical attached power under different stool for supporting inside clearance anchor pole central points
Surface displacement result of calculation is as shown in table 2, according to the stool for supporting inside clearance that the result of calculation is drawn and ground epitope
It is as shown in Figure 5 to move corresponding curve diagram.
Table 2：Different stool for supporting inside clearance condition lower bolt central spot surface displacements
Table 3：Soil body vertical attached power and earth's surface under the comprehensive different stool for supporting inside clearance anchor pole central points obtained
Displacement list
In the present embodiment, stool for supporting inside clearance just refers on the inside of two stool legs the distance between inner side S1。
From table 3 it can be seen that (soil nailing a diameter of d, i.e. 3d), stool for supporting load when stool for supporting inside clearance is 0.45m
It is 42.44kPa in the soil body maximum vertical additional stress that anchor pole central spot produces, it is with stool for supporting load ratio
7.64%, the surface displacement of generation is 1.62mm, and influence is smaller, therefore at the scene can be by two stool for supporting inside clearances in detection work
Primarily determine that as more than or equal to 3d.
Above-described embodiment of the utility model is not the restriction to scope of protection of the utility model, the reality of the utility model
Mode not limited to this is applied, all this kind the above according to the present utility model, according to the ordinary technical knowledge of this area and used
With means, under the premise of the above-mentioned basic fundamental thought of the utility model is not departed from, the utility model said structure is made its
The modification, replacement or change of its diversified forms, should all fall within the scope of protection of the utility model.
Claims (5)
1. the stool for supporting formula counterforce device of anchor pole pullout tests, the lower end of anchor pole (1) are stretched into rock-soil layer, it is characterised in that：Institute
State moveable anchor (2), centre-hole jack (3), backing plate that device includes setting gradually from top to bottom along anchor pole (1) axial direction
(4) and stool for supporting (5), described device further include reference stake (7), datum line beam (8) and displacement measuring instrument (9), the support
Stool (5) is formed by stool surface (51) and with vertically disposed two stool legs (52) of stool surface (51), and it is mixed that stool leg (52) is placed on injection
On solidifying soil surface layer (6) or rock-soil layer, backing plate (4) support is in stool surface (51), and the upper end of anchor pole (1) is from bottom to top successively from described
At the center of stool for supporting (5), backing plate (4), centre-hole jack (3) and moveable anchor (2) pass through, and the top of anchor pole (1) from
Moveable anchor (2) stretches out, and moveable anchor (2) clamps anchor pole (1), and the reference stake (7) and datum line beam (8) are respectively positioned on stool surface (51)
Lower section, reference stake (7) squeeze into gunite concrete surface layer (6) or rock-soil layer, and datum line beam (8) is erected on reference stake (7), institute's rheme
The gauge stand of shift measurement instrument (9) is installed on datum line beam (8), and the anchor pole (1) is positioned at stool surface (51) and gunite concrete face
The body of rod between layer (6) or rock-soil layer, which is additionally provided with to pull out, measures piece (10), and described pulling out measures the vertical body of rod of piece (10) and set, and
And the upper surface for pulling out measurement piece (10) is in contact with the indicator of displacement measuring instrument (9), the centre-hole jack (3) is used to add
Carry anchor pole pullout tests load, the displacement measuring instrument (9) be used for measure anchor pole (1) on the amount of pulling out.
2. the stool for supporting formula counterforce device of anchor pole pullout tests according to claim 1, it is characterised in that：The amount of pulling out
It is steel disc to survey piece (10).
3. the stool for supporting formula counterforce device of anchor pole pullout tests according to claim 1, it is characterised in that：Two stools
The distance between on the inside of foot (52) and inner side S1>=3.0d, wherein, d is the bore diameter of anchor pole.
4. the stool for supporting formula counterforce device of anchor pole pullout tests according to claim 1, it is characterised in that：The reference stake
(7) the distance between center and anchor pole center S2>1.0m。
5. the stool for supporting formula counterforce device of anchor pole pullout tests according to claim 1, it is characterised in that：The reference stake
(7) the beeline S between center and stool leg3>=1B and>1.0m, wherein, B is the width of stool leg.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721089928.7U CN207348114U (en) | 2017-08-29 | 2017-08-29 | The stool for supporting formula counterforce device of anchor pole pullout tests |
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|---|---|---|---|
| CN201721089928.7U CN207348114U (en) | 2017-08-29 | 2017-08-29 | The stool for supporting formula counterforce device of anchor pole pullout tests |
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| CN207348114U true CN207348114U (en) | 2018-05-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476358A (en) * | 2017-08-29 | 2017-12-15 | 广东省建筑科学研究院集团股份有限公司 | The stool for supporting formula counterforce device and its installation method of anchor pole pullout tests |
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2017
- 2017-08-29 CN CN201721089928.7U patent/CN207348114U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476358A (en) * | 2017-08-29 | 2017-12-15 | 广东省建筑科学研究院集团股份有限公司 | The stool for supporting formula counterforce device and its installation method of anchor pole pullout tests |
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